/*
 * Copyright 2010 Gal Dolber.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.unnison.framework.client;

import com.google.inject.Inject;

import com.unnison.framework.client.binder.GuitBinder;
import com.unnison.framework.client.command.CommandService;
import com.unnison.framework.client.eventbus.EventBus;
import com.unnison.framework.client.place.PlaceManager;

/**
 * Abstract presenter with EventBus, CommandService and PlaceManager support.
 * @param <B> Binder class.
 */
@SuppressWarnings("rawtypes")
public abstract class GuitPresenter<B extends GuitBinder> implements Presenter {

    protected EventBus eventBus;
    protected CommandService commandService;
    protected PlaceManager placeManager;
    private B binder;

    @Override
    public View getView() {
        assert binder != null : "The binder is null in the contructor, override initialize()";
        return binder.getView();
    }

    /**
     * Get called after the binder, eventbus, commandservice and placemanager get injected.
     */
    protected void initialize() {
    }

    @Inject
    @SuppressWarnings("unchecked")
    public void inject(EventBus eventBus, CommandService commandService, PlaceManager placeManager, B binder) {
        this.eventBus = eventBus;
        this.commandService = commandService;
        this.placeManager = placeManager;
        this.binder = binder;
        binder.bind(this, eventBus);
        initialize();
    }

    /**
     * Release the view and unbind all view events.
     */
    @Override
    public void releaseView() {
        assert binder != null : "The binder is null in the contructor, override initialize()";
        binder.releaseView();
    }
    
    @Override
    public void destroy() {
        assert binder != null : "The presenter is already destroyed"; 
        binder.destroy();
        eventBus = null;
        commandService = null;
        placeManager = null;
        binder = null;
    }
}
